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प्रश्न
State the contributions of John Dalton – towards the development of Chemistry.
उत्तर
John Dalton
1. He compiled his theory in 1803 known as Dalton’s atomic theory.
2. The main postulates of Dalton’s atomic theory are that “Matter consists of particles called atoms, which are indivisible and cannot be created or destroyed.”
3. The theory was later contradicted in certain aspects by the Modem atomic theory
संबंधित प्रश्न
Give two examples of the following substance.
Medicines
Give two examples of the following substance.
Building materials
Give two examples of the following substance.
Chemical war weapons
Name the scientists who discovered the following:
Oxygen
Name the scientists who discovered the following:
Elements
_____________ help to increase the production of food.
Fill in the blank:
L.P.G. is used for ___________
State the contributions of Antoine Lavoisier
Differentiate between the terms food preservatives and food processing with appropriate examples.
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.
